Casing-in process



Feb. 9, 1932. w, MEYER ET AL 1,844,516

CASING-IN PROCESS Filed April 26, 1930 ATTORNEY Patented Feb. 9, 1932UNI ED STATES PATENT OFFICE wmn 1mm 0] 0m VERNON, AND RALPH I.DUIN'IWALD, OI BBONIVILLE, NEW YORK enema-m raoonss Application filedApril 28, 1880. Serial No. 447,4.

This invention relates to improvements in the art of bookbinding, inwhich a plurality of pages or sheets of paper or the like, arran edcommonly by doubling each sheet, the fol ed edges being superposed oneupon another to form grou s and these groups again arranged side byslde, each group being secured by stitching or adhesives to a flexiblebacking.

Finally the book thus formed is put in covers, this process being knownas casing in, and consists of applying protective layers, flexible orrigid on the sides, these covers being connected by a flexible backingto permit opening the leaves of the book.

The backing and covers have hitherto been secured to the outer blankpages of the book by an adhesive which requires considerable time duringwhich the books must be placed in a binders press to thoroughly set anddry.

The present invention has as its object the attachment of covers to abook by a dry adhesive rendered operatively soft by the application ofheat rather than moisture and which after setting, has no tendency tostick to extraneous objects.

A further feature is in the provision of paper properly impregnated witha suitable adhesive for use as the paste-down of the lining sheets of abook.

Another aim is to provide a rapid, efiicient process for casing-in bookswhereby a neat appearance is produced together with unusual strength andsolidity and without the loss of time heretofore required for drying andsetting while at the same time obviating the use of a binders press.

These several advantageous objects are at tained by the novel andpractical process hereinafter described and clearly shown in theaccompanying drawings, forming part of this disclosure, and in which:

Fig. 1 is a partial end elevational view of a book with the bindingelements in position for attachment.

Fig. 2 is a similar view of the same parts after attachment, one of thecovers being closed and the other partially open.

Fig. 3 is a view similar to Fig. 4, but showing the omission of tissueadhesive.

Fig. 4 is an end view of a complete book as held between the heatedpressure-plates of a finishing press.

In the several views a plurality of folded leaves 10 are gather ed intoa series of sections 11, the several folded edges of each section beingsewn or cemented to a sheet 12 of strong open meshed textile fabric, ascrash, its longitudinal edges extending uniformly outward at both sides.

On the outer side of the fabric is secured a paper reinforcement 13,preferably increasmg m thickness towards its central portion.

Against the outer surfaces of the outermost or fly leaves of the bookare disposed lining sheets of any suitable material 14, folded at 15,and turned reentrantly outward, the outer fold or paste-down 16 beingdisposed within the loose flaps of the sheet 12.

A second single sheet 17 of tissue or like material is disposed over theflap on each side, these elements 17 being coated or impregnated on bothsides with a dry adhesive subject to the effects of heat whereby it isrendered temporarily viscuous and strongly adherent until the stage ofdryness has been reached, no moisture being used.

The book covers 18, while shown as stifl, may be flexible if preferred,and are provided with creases or joints 19 leading from the back 20,which is of such flexibility as to permit free opening of the book.

The whole is placed between dies or plates 25-26 arranged as a press andprovided with a heating means, as the electrical coils 27-28 shown.

The heat transmitted from the plates passes through the book coverscausing the adhesive with which the elements 17 are provided tounite'with the covers and lining sheets as is plainly indicated in Fig.2, completing the operation.

In the modification shown in Fig. 3, the parts and process are aspreviously described, the only difference being the omission of tissue17, in which case the adhesive had been previously a plied to thepaste-down 16 and flows from t e elements 16 through the flaps of thefabric 12 to become united to the inner surface of the covers, and fromthe fly leaves 14 if provided with adhesive, to the outer leaf of thefirst and of the last signatures.

Obviously, the inner face of cover 18 itself may be coated with the dryadhesive in which case no adhesive is provided on the pastedowns 16, noris any adhesive tissue 17 required.

Having thus described our invention, what we claim as new and desire tosecure by Letters Patent, is:

1. The process of bookbindery which consists of grouping leaves intounitary sections or signatures, securing a sheet of textile fabric tothe back of said sections or signatures, said sheet having extendingside flaps, applying a cover consisting of sides and back over theconnected signatures, inserting a sheet of adhesive impregnated materialbetween the outermost leaves of said signatures and the inner surfacesof the covers to cover said side flaps, pressing the covers on the book,and applying heat during the pressing operation thereby to cause theadhesive to adhere- 2. The process of bookbinding which consists inattaching the grouped leaf sections or signatures and the lining sheetsto a flexible backing having laterally extending flaps, en shrouding thebacked sections or signatures and lining sheets in a cover the outerleaf of said lining sheet constituting a paste-down,

- inserting between the paste-downs and cover,

sheet of material impregnated with a dry substance rendered adhesive byheat, said material contacting with the inner surface of said flaps, andapplying pressure in the pres ence of heat to said covers.

3. In the bookbinding art, the process of casing-in which consists oftipping to the book the lining sheets, the outer leaf of whichconstitutes a paste-down, placing on each paste-down a dry adhesivesheet, placing the entire'assembly within a casing, and submitting thecasing and contents to pressure between heated plates whereby said dryadhesive causes a union between the pastedowns and the casing.

Signed at New York, in the county and State of New York, this 15 day ofMarch,

RALPH M. DUENEWALD. WALTER MEYER.

